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Why do you get goose bumps

Have you ever wondered why the hairs rise up on you when you are cold or being scared?

Now, researchers from Harvard University found the reason for the goose bumps, writes the Harvard Gazette under

Researchers have discovered that the cell types that cause goose bumps, also is important for regulating the stem cells that regenerate hair growth.

the Muscle that sammentrækkes to create goose bumps, is needed to bridge the so-called 'sympathetic nerves' connection to hair follicle-stem cells.

When we freeze, responds to the sympathetic nerve to pull the muscles together and cause goose bumps. It happens briefly, but in the long term enables the response of stem cells and create hair growth, according to the Harvard Gazette.

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the Researchers also investigated on the mouse, what maintained nerveforbindelserne to hårsækkens stem cells. When they removed the muscle that was associated with the hair follicle, drew the sympathetic nerve back, and nerveforbindelsen to hårsækkestamcellerne disappeared.

This means that the muscle is a necessity to bridge the gap between the sympathetic nerve and the hair follicles, writes Harvard Gazette.

the Results, published in the scientific journal Cell, has given researchers a better understanding of how different cell types interact to connect stamcelleaktivitet with changes in the external environment.

- We have always been interested in understanding how the stamcelleadfærd regulated by external stimuli. In this study, we identify an interesting niche with two components, which not only regulates stem cells during steady-state, but also modulates the stamcelleopførsel according to changes in temperature outside, says Ya-Chieh Hsu, Alvin and Esta Star associate professor of stem cell and regenerative biology from Harvard University, who led the study for the Harvard Gazette

In the future the researchers would like to examine how the external environment can affect the stem cells in the skin under the among others the wound healing.

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